ACI A/RH2 HUMIDITY TRANSMITTER | ±2% ACCURATE HVAC & BAS SENSOR

The ACI A/RH2 series from Automation Components, Inc. (ACI) consists of high-reliability relative humidity transmitters designed to integrate seamlessly into modern Building Automation Systems (BAS).

A highly accurate (±2%) relative humidity transmitter featuring a thermoset polymer capacitive sensing element and field-selectable analog outputs.

 

ACI A/RH2 HUMIDITY TRANSMITTER | ±2% ACCURATE HVAC & BAS SENSOR

The A/RH2 Series is engineered for long-term stability using advanced capacitive technology that offers excellent resistance to dust, dirt, and common environmental chemicals. Each unit includes on-board DIP switches, allowing users to toggle between 4-20 mA, 0-5 VDC, or 0-10 VDC signals to meet varying application requirements. These sensors are factory-calibrated in NIST-traceable chambers and feature a hydrophobic filter to protect the element from moisture and contaminants.

PRODUCT USES:

  • Building Automation: Core sensor for managing commercial HVAC and air quality.
  • Controlled Environments: Monitoring for cleanrooms, laboratories, and data centers.
  • System Protection: Managing humidification and dehumidification cycles.
  • Preservation: Environmental control for museums, schools, and office buildings.

 

Technical Sheets

Instruction Manual

Catalog Page

Specifications

ACI A/RH2 HUMIDITY TRANSMITTER | ±2% ACCURATE HVAC & BAS SENSOR – KEY SPECIFICATIONS

  • Accuracy: ±2% relative humidity (RH) at 77°F (25°C) from 10% to 95%.
  • Stability: Less than ±2% drift over a 5-year period.
  • Measurement Range: 0% to 100% relative humidity.
  • Output Signals: Field-selectable 4-20 mA (default), 0-5 VDC, or 0-10 VDC.
  • Supply Voltage: 12-40 VDC or 18-28 VAC depending on the output configuration.
  • Response Time: Typically 20 seconds for a 63% step change.
  • Enclosure Options: Room (Delta style), Duct (Euro or NEMA 4X), and Outside Air (Weatherproof). 

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